Well, I know why they let you demo these bad boys. Took a 2 hour mow job with an Ariens 10/28 down to .6 of an hour. I know this because of the handy hour meter. :blob3: Anyhoo. I dont need the hour meter or lights....but this has a newer upgraded trans over the 15/40. Im looking at the 15/40 because 3K is hard enough to swallow! The dealer says the 15/40 will mow just as well and actually a little better because it has a newer Kohler in it. GREAT site, helped me tons in choosing what I was looking for (didnt ask, used that fancy search button) I know, strange for a newb but I belong to enough boards that I know the same ol questions are always answered.